Adjusting screw for string instruments



FIG. 1 is a top plan view of an adjusting screw for string instruments showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof; and,

FIG. 5 is a top front perspective view thereof. 

The ornamental design for an adjusting screw for string instruments, as shown and described. 